Hybrid Car – More Fun with Less Gas

still looking to buy elec car- with these features - Page 2

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Posted by cjt on August 8, 2009, 7:37 pm
 
Eeyore wrote:


There have been experimental (small) cars built that run solely on
solar power.  If that's possible with current low-efficiency devices,
surely it should not violate the laws of physics to do something on
a somewhat larger scale with, in effect, double or more panel size
(i.e. one on the car and another at home).  I note that the OP did
not limit the size of the panels at home to just what would fit on
a car.

Perhaps it's just a lack of imagination, motivation, time and economics
holding us back, rather than the laws of physics?

Posted by Bruce Richmond on August 8, 2009, 8:44 pm
 

Look them up.  If you find one that you think would be practical to
drive in normal traffic post a link to it.



Posted by cjt on August 8, 2009, 10:44 pm
 Bruce Richmond wrote:


I never said they were.  But I don't think they're so far away
from realistic that, e.g., even a tripling of efficiency wouldn't
make them practical.  That is to say, the laws of physics aren't
the obvious problem.



Posted by Bruce Richmond on August 8, 2009, 11:34 pm
 
Yes, they are.  Electric motors are already ~95% efficient.  Explain
how you think they are going to be made two or three times more
efficient.  The solar cells used in those cars were already on the
bleading edge of current technology.  Gains are made in very small
increments, and the bleading edge stuff is very expensive.  With the
comment about wanting a "GOOD WARRANTY" I didn't figure this was a
"money is no problem" request.


My comments above were talking about a car running off onboard solar
panels.  If you want to allow additional equipment at home that is a
different game.  Just buy a new Nissan.

http://www.guardian.co.uk/business/2009/aug/02/nissan-unveils-electri ...

It should come with a "GOOD WARRANTY".  Buy the 1200 watts of solar
panels and a bank of deep discharge batteries (in addition to the
battery pack you had to get for the Nissan, since it doesn't come with
one).  Then buy a DC to DC charger.  Charge the battery bank all day,
then use it to charge the car battries over night.  Be sure to get
enough panels and batteries to hold you over on those cloudy days.  If
you shop around you might be able to get all this for four or five
times the cost of a gasoline powered car.  If you don't want to put
this all together on your own I am sure there are businesses out there
that would be happy to do it for a fee.

Posted by Eeyore on August 13, 2009, 3:30 pm
 

Bruce Richmond wrote:


< snip>


http://en.wikipedia.org/wiki/Planck_constant#Photoelectric_effect

Graham

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